Alarm unit housing



FIG. 1 is a front elevational view of an alarm unit housing showing my new design;

FIG. 2 is a left side elevational view thereof, with the right side being a mirror image;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top front perspective view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a alarm unit housing, as shown and described. 